William b



WILMA'M n. BEMENT, or PHILADELPHIA, PENNSYLVANIA.

Lasers, Patent Najsss, dans Mai-6h 1o, isos.

IMPR.O VlllIENl IN BOLT-THREADING MACHINE.

dite tlptnle retentit in these trttsrs zztent transiting putt ni tigt sii-nrt.'

-10 A LL WHQM IP MAY- CONGERN: s

Be it known that I, WILLIAM'B. BE-MENT, et' Philadelphia, Pennsylvania, have invented an Improved .Bolt

and Nut-Threading Machine and-I do hereby declare the following te be a full, clear, andexact description 0f the same. i i

My invention consists, first, of mechanism described hereafter, for openingtand closing the dies while theY machine isrin motion; second,.n cutting dies secured tosliding blocks; but admitting of an adjustment independentof the same, as erplai-ued hereafter; third,A of an automatic oiling-apparatus; fourth, of mechanism described hereafter, foroperating the sliding head or plats, which carries the jaws for holding thenuts.' Invorder to enable others familiar with machinery of this class to make sind use my invention,- I will now proceed to describeits construction and operation, reference being had to the accompanying drawing,'which forms a part of this specication, and in fwhich- Y i l Figure 1 is a sectional'elevation ofmy improvedbolt and nut-threading machine.

Figure 2, a transverse section of the same, on the line 1-2, Eg. l. Figure 3, a. sectional planon the ,line 5 6, g. 1, of a' portion of the machine drawn to an enlarged scale. 'Figure 4, 'a transverse section'on the line 3-4ig, 3; and vFigures and-6, detached views, also enlarged, of portions of the machine.

Similar letters refer-to similar parts throughout the several views. A is lthehollovv cast-iron vframefof .themachine,'ha.ving suitable bearings, in which, and in an armf'lz, projecting from the frame, turnthe journals of a hollow spindle B, and to this spindlejis secured an ordinary cono- `pulley', C, in place o which gearing may be used -when the machine is 4of the larger class.

lA disk, D,'is f1tt e`d snu`gly, 'but soas to turn freely on the spindle B, its independent motion being limited by a coiledspring', d, containedgina recess in therear side ofthe disk, (iig. 3,)cne end of the said spring being secured vtothe spindle, while the oppositeend is-secured to the disk, (s ee dotted lines in iig. 4.)` Atthefront side of the disk -D is .an internal cog-,tv heel, e, into which 4'gear toothtad-segmentsfj, the latter being secured to spindles f', which pass longitudinally through and turn in a. portion of the spindle B, (see iig.

A flange, g, extends 'around and forms apart of the disk andi-s situated between friction-brakes z aud Jr', which are curved-to conform to-theshape ofthe disk, as shown in g. 3. The brakeh is secured to a sleeve,

,whichpa'sses'through and is supported by a projecting portion ofthe frame of the machine, and the brake h .is'seciired to a spindle, j, which passes. through the said sleeve, A. lett-handed screw-thread is cut'on the outer `end of the spindle j, for receiving a nut, jl, which hears against' the sleeves', and is provided with'a suitable handle, jz, (fig.

When the handleisin the vertical position .shown by dotted lines, iig. 4, the brakes h and L d not bear against the angeg oi' the loose disk E, which is therefore free to turn with the spindle B, but on turning the Yha.nd le 7`2`to the horizontalpiosition shown in 3, thebrakes are'draivn towards each other, so as'to gripe the flange of the loose disk, and arrest the motion offthe latter. When the diskis'thus held, the segmentsf and their spindlesflare turned, until their-curved edgesfz'bear against'tbc spindle B, as shotvrvin dotted lines, g. 4, when the'friction ofthe brakes t and t" will be overcome, and the disk willnecessarilyrturn withits spindle.

. If th'e handle'j2 be now turned Vto its original vieil-tical position, the disk D, freed from the `action of the brakes,

will by the action o f its coiled spring d, return to its former position, and the segmentsf will againassume the position shown in iig. 4." Y i the front end of the spindle B is an 'enlargement or head, E, in Vwhich are formed grooves at right angles to each other, as' shown in iig. 2. In one of these 'grooves,.which is partly.dws-tailedI and partly straight, as shown in iig. 1, are arranged to vslide the ,die-carriers, each of which consists of two blocks c and c, (fig. 3,) the former sliding in the straight, and the latter in the dovetailed portion of the gruu've.

Each of the die-plates lis reversible, and is secured to the block c by a screwj, asshown in the druvi'ing, andthe blocklc is secured to and may be adjusted to any positionin respect to the block c'bya scretv, m, (iig. 3.) A pim-fn, forming a' part of butsituated eccentrically with each of -the short spindles f, enters a slot formed in each of the blocks 7c, so that as the spindles are turned, as above described, the blocks and their die-plates will be moved from or towards the centre of the spindle B. l v

Two dies y, the inner edges ofvwhich are notched, as shown-in g. 2, slide in grooves at` right angles to tho die-plates Z, and may be moved to and fro in the said groove by operatingtheir feed-screws y.

A plate, F, is arranged to slide on guides p, formed on the upper portion of the frame ot' the machine, and is confined thereto vertically by projections or lips u nderlapping the said guides, as seen in g. 5, and at the rear of this sliding plate is hung a. hand-lever, g, to the short arm of which ishinged a spring-pawl, g1, the point of .the latter beingadapted to the teeth of a rack, q2, so that when its lever is vibrated, the sliding plate is caused to move up'on.the guidesp towards the ,head E of the spindle B. y

When the operating-handle is released, it will lfall toisuch a. point that the pawl is free from contact with the rack, which does not prevent the sliding plate F from bcingmoved back onv its guides by hand.

Two blocks, r and r', slide in dove-tailed yguides formed on the plate F, and may be moved simultaneously from or towards each other byturninga rod, s, which passes through the said blocks, and has cut'upon it right and left-handed screw-threads, as shown in fig. 5. Each of these blocks r and r' is provided with a notched die, t, (ig. 5,) thev two dies together being arranged for griping the head of a bolt, which when thus heldfis in line with the centre of the spindle B.,

At each endof the sliding plate Fis formed a cavity, t1, so arranged as to receive the droppings of oil from the. plate, and direct them on to the inclined surface u of the frame of the machine, 'from which the oil or other lubricant flows through the straining-sieve u into .the reservoir a. I A pump-barrel, G, is bolted or otherwise secured to the bottom of the .reservoir a,- and its hollow plunger v, contains a spiral spring, 11', which, bearing on the bottomof the barrel, has a constant tendency to elevate the plunger, the latter-carrying on its top a roller, 2, which is acted upon by aneccentric or cam, i0, on' the spindle B, so that. by the combined action of this eccentric or cam, and the spring Vwithin the plunger, the desired reciprocating motion is imparted' to the latter. y f I Y When the plunger` rises, the oil or other lubricant passes from the reservoir a into the-barrel ofthe pump through a number of small apertures, z, (fig. 1,)'and by the return motion of the plunger is forced, thence through the valve-chest, shown in iig. 2, and through small tube, zu', which is so 'bent as to direct lthe oil to the point where the die-plates ZZ are acting on thestem of the bolt.

The spindle B, with ,its screw-cutting dies I Z, is rotated in the direction ot' the arrow, iig. 4, and the v.bolt Z, on which the thread has to be cut, is held between the dies t t of the sliding plate F, as shown in-r'ed `lines Tg.. 1. .The plate, with its bolt, is moved forward towards the screw-cutting dies Z- Z, by operating the lever g,

until the cutting of the screw is commenced, when the handle is released, and the sliding plate vis free to be moved forward by the action of the cuttingdies on the bolt. When the operation has been completed, the handle l7'2 is operated by the attendant, and the dies Zdrawn apart in the manner before described, through the medium of the loose disk D, segmentsf, spindlesfhand their` I eccentric-ends n. The plate F is now moved back .by hand, and the boltdthereby withdrawn'froinbetween the opened dies, after which the handle is restored to its upright position, and the dies thus closed, by the recoil orf, the spring d, as. described above, without any change of the revolving spindle. l

This machine may also be used for threading nuts, which are held between the notched plates g/,and

-threadrd by a tap secured to the-cross-head F.

The saturated particles of metal cut from the bolts, and the drippings of oil fromzvarious parts'of the machine, vfall upon the inclined surface u and sieve u', t'he pure oil passing through the latter, and dropping into the reservoir from which it is again dumped up to lubricate the bolts as theyare cut.

The above arrangement is an effective automaticoiling-device, and is economicalin its' operation, asvvery little if any of the oil iswasted. Y l Y Iclaim as my inventioml'and desire to secure by'Letters Patent y l 1. For opening-*and closing the dies while themachn'e is in motion, two orvmore cranked or eccentricspindlesf, each carrying a toothed segment or pinion, adapted to internal teeth` ina loose disk, which is com trolled partly by a spring, d, and partly by the friction-clamp herein described, or any equivalent to the same, the whole bei-ng combinedwith the spindle of a screwing-machine, substantially as specified.

2. The cutting-dies Z l, secured to the blocks 'n n, but. admitting of an adjustment independently of the latter, substantially as speciiied.y Y

3. The pump, with its piston and spring, in combination', with thespiudle B, and its eccentric or. cam, substantially as and for the purpose hereiii setforth. Y

4. The within-described lever, spring-pawl, andv rack, arranged for operating the sliding headv or plate, substantially as s et forth.

In testimony whereof, I havesigned my name to this specification in the presence of two subscribing witnesses.

' WM. B. BEMENT.

Witnesses:

WILLIAM H. CnoMwELL, JOHN M. SHRIGLEY. 

